Suppress layout on older platforms

We can use a dummy empty LayoutTransition to suppress layout in a
ViewGroup on API level 14-17. On 18 and above, we can just use the
platform implementation.

Bug: 31363029
Test: AutoTransitionTest pass on 14, 18, 19, and 25
Change-Id: Ic4add882963382f730bcc497ebf8f0323f19538b
12 files changed